$\"\"$

\

The equation is $\"\"$ .

\

Compare equation with standard form $\"\"$ and compare the coefficients.

\

Here $\"\"$ and $\"\"$ .

\

Rotate the axis and angle to the equation $\"\"$ .

\

Substitute: $\"\"$ .

\

$\"\"$ .

\

$\"\"$ . \ \

\

$\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

$\"\"$

\

The rotation formulas are $\"\"$ and $\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The solution is $\"\"$ and $\"\"$ .